Description

Deduplication is a technique used to reduce the amount of storage needed by service providers. It is based on the intuition that several users may want to store the same content. Hence, storing a single copy of these files is sufficient. Albeit simple in theory, the implementation of this concept introduces many security risks. As the world moves to digital storage for archival purposes, there is an increasing demand for systems that can provide secure data storage in a cost-effective manner. By identifying common chunks of data both within and between files and storing them only once, deduplication can yield cost savings by increasing the utility of a given amount of storage. Unfortunately, deduplication exploits identical content, while encryption attempts to make all content appear random; the same content encrypted with two different keys results in very different ciphertext. Thus, combining the space efficiency of deduplication with the secrecy aspects of encryption is problematic. Companies are collecting and storing huge amounts of data, much of it redundant. Many organizations are turning to data deduplication to reduce these huge information volumes, as well as the equipment and operational costs they entail. In this project, the system proposes an authorized duplicate check scheme.